Melamine: nws yog dab tsi thiab nws siv li cas?

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

piav qhia thiab khoom

Melamine. Nws yog dab tsi? Qhov no yog cov tshuaj sib xyaw ua ke hauv daim ntawv ntawm cov xim tsis muaj kob, uas yog raws li triazine. Nws yuav luag insoluble nyob rau hauv dej thiab kua solvents. Nws melting point yog 354 degrees. Tom qab ncav cuag lub cim no, cov txheej txheem decomposition pib.

Scope of application

Tsuas yog siv chromatography, nws tuaj yeem txiav txim siab tias cov khoom tshwj xeeb muaj melamine. Ntau tus neeg paub tias cov tshuaj no yog siv rau hauv cov txheej txheem tsim cov nplaum, kua roj vanish, yas, tshuaj tua kab, chiv thiab dyes. Tab sis ob peb tus neeg paub tias qee tus neeg tsim khoom noj khoom haus tsis zoo ntxiv rau lawv cov khoom. Qhov no yog vim hais tias lub compound muaj peev xwm qhia tau ib tug ntau dua concentration ntawm cov protein thaum lub sij hawm kev ntsuam xyuas. Qhov chaw uas muaj cov tshuaj no yog cov resistant rau txhua yam kev nyuaj siab thiab tsis poob lawv cov yam ntxwv txawm nyob rau hauv lub zog ntawm lub hnub. Hauv qhov no, feem ntau nws tuaj yeem pom hauv rooj tog, txawm tias nyob rau hauv xws li cov khoom xws li countertop. Melamine yog ib qho yooj yim los ntxuav, nws tsis ntshai ntawm kev ntxuav nrogsiv txhua yam khoom siv tu.

Danger

Cov tshuaj no feem ntau yog siv los ua lub hauv paus rau kev tsim cov yas. Yog vim li cas rau qhov no yog qhov yooj yim heev - cov khoom yas tsis tawg, muaj cov qib siab ntawm lub zog thiab kub tsis kam yog tias lawv muaj melamine. Tsawg tus neeg paub tias cov tshuaj no muaj kev phom sij rau tib neeg yog tias siv rau lwm lub hom phiaj. Ua ntej tshaj plaws, peb tab tom tham txog kev lag luam zaub mov. Qhov tseeb yog tias thaum cua sov, nrog rau kev sib cuag nrog cov zaub mov thiab dej, cov yas tso tawm formaldehyde, yog li nws tsuas yog tsis tsim nyog siv cov khoom siv hauv kev tsim cov tais diav. Kev lees paub tias melamine muaj teeb meem thiab txaus ntshai rau tib neeg kev noj qab haus huv yog cov npe ntawm cov txiaj ntsig uas nws tuaj yeem ua rau. Ntawm lawv yog mob qog noj ntshav, kab mob ntawm daim tawv nqaij, kab mob kev ua me nyuam, kev ua xua ntawm lub ntsws. Muaj qhov tshwm sim siab tias qhov tshwm sim ntawm qhov mob hnyav (peb grams ntawm ib qho khoom ib kilogram ntawm qhov hnyav) feem ntau yuav ua rau tuag taus.

Ntiaj Teb Cov Ntsiab Lus

Nyob hauv European Union, qhov kev tso cai txhua hnub ntawm melamine los ntawm ib tug neeg yog teem rau ntawm 0.2 mg rau 1 kg ntawm lub cev qhov hnyav. Qhov ntsuas zoo sib xws hauv Canada yog 0.35 mg, hauv Asmeskas - 0.063 mg. Raws li cov lus pom zoo los ntawm Lub Koom Haum Saib Xyuas Kev Noj Qab Haus Huv Ntiaj Teb, kev nyab xeeb txhua hnub ntawm cov tshuaj rau tib neeg yog 0.2 mg / kg ntawm lub cev hnyav.

melamine tableware

Nws tsis yooj yim sua kom tsis txhob hais txog qhov tseeb ntawm cov tais diav, uas muaj melamine, tias qhov no yog kev cai hauvpeb lub teb chaws tsis raug txwv, txawm tias muaj toxicity thiab txaus ntshai heev. Nws tau pom tias nws tuaj yeem siv tau rau kev kho kom zoo nkauj. Nrog rau qhov no, muaj cov kev cai raws li cov cutlery thiab tais diav yuav tsum tau sau npe qhia tias muaj melamine nyob rau hauv lawv cov muaj pes tsawg leeg. Ib rooj plaub hauv 2008 hauv Suav teb tau qhia. Tom qab ntawd ib qho ntawm cov tuam txhab tsim cov qauv me nyuam qhuav qhuav ntxiv cov khoom rau lawv cov khoom. Qhov tshwm sim ntawm cov kev ua no yog kev tuag ntawm plaub tus menyuam mos. Ob tug neeg lav ris rau qhov no raug tua. Txawm hais tias txhua yam, tam sim no Tuam Tshoj tseem yog lub ntiaj teb tus xa khoom loj tshaj plaws ntawm melamine. Muaj tseeb tiag, tsoomfwv hauv nroog tau txo qhov ntim ntawm nws cov khoom tsim tawm thiab nruj tswj hwm qhov muaj peev xwm ua tsis tau.